The Design And Research Of Drive Controller For Inchworm Linear Motor

Inchworm linear motor is the imitation of inchworm motion, while the piezoelectric element is a driving force conversion component. Inchworm linear motor is a nano-precision piezoelectric-driven linear stepper motor. It has very broad application prospects in the aerospace, fiber optic docking, bio-engineering, micro-surgery, ultra-precision machining and so on. Its drive controller is an important factor affecting the accuracy of an inchworm linear motor, so designing a drive controller of high performance is of great significance for improving the accuracy of an inchworm linear motor.This paper discusses the drive controller design. First of all, by researching the principle of inchworm linear motor and the status of research development of drive controller at home and abroad, the article puts forward a combination of the signal generator and piezoelectric-driven power as the system solution.At the same time, the article describes hardware and software designing principles and programs in detail. Drive controller hardware has three components from the DC voltage regulator module, amplifier module and controller module, to generate and amplifies the drive signals. Its software is prepared in the DSP controller to generate drive signals, monitor the output signals, select the drive modes, set the drive parameters and prompts the user to operate.Finally, the prototype developed by the article is tested, the output voltage range of 0 ~ 200V, single maximum output current of 240mA, the maximum output power of 144W, when the load 5 F frequency response of 40Hz or so, the ripple of less than 200mV, linearity of greater than 99.9%, a resolution of about 50mV.